Improvement in crimping-clamps



UNITED `JOHN KNSTLER, OF COLLINSVILLE, CONNECTICUT.

IMPROVEMENT IN CRIMPING-CLA'MPS.

Specification forming part of Letters Patent No. 117,304, dated July 25, 1871.

To all whom fit may concern:

Be it known that I, J oHN KUNSTLER, of Gollinsville, in the eounty of Hartford and State of Connecticut, have invented an Improved Crimp ing-Clamlnof which the following' is a speciication:

This invention is a device for use in making boots, and is intended to facilitate the process known among shoemakers as crimping.

Figure l is a side view. Figa? is a view at right angles to the View in Fig. l.

a indicates a metal fork, which forms the main body of the clamp. b is the hand-screw, which serves to strain the leather after the clamp is applied. o c are springs fastened at d l to the outside of the fork a, running down to the ends of the fork, and there turning a right angle inward, formin g teeth o o', which bite down onto the leather When the springs are compressed, Which is done by means of the thumb-nuts e e running on screw-pins ff running through the springs into the fork.

I am aware that a clamp very much like this has been heretofore invented, to Wit, the clamp shown in patent No. 46,427, dated February 14,

1865; but it is not intended herein to claim anything which might be properly claimed on that clamp, or in anywise interfere With that clamp 5 but my clamp has most important advantages over that, in that, 1st, it is simpler and easier and cheaper to make. 2d, to catch hold of the leather with the clamp shown in said patent it has to be raised oit' the block, and is left in that position When the crimping is finished, which is a disadvantage. The edges are also drawn over raised edges or corners, which must inevitablyT tend to crack and split the leather if much strain is put upon it. Hy invention, obviously, has none of these defects.

I claim as my invention- A crimping-clamp, composed of the fork a., hand-screw b, springs o c, forming teeth c' o over the ends of the fork, and compressed by thumbnuts e e on the screw-pins ff, the Whole arranged, constructed, and operated substantially as and for the purposes set forth.

JOHN KUN STLER.

Witnesses:

A. L. THAYER, O. F. PERRY. 

